Gaya APA
MURPHY, R. (2002).
Basic grammar in use / Raymond Murphy dan William R. Smalzer (ed.2, cet.1).
:
Cambridge univ. press.
Gaya MLA
MURPHY, Raymond.
"Basic grammar in use / Raymond Murphy dan William R. Smalzer".
ed.2, cet.1
:
Cambridge univ. press,
2002.
Referensi.